A group of Jamoma-developers presented a paper suggesting an extension to OSC at this year’s NIME in Genova two weeks ago:

Reference:
Place, T., T. Lossius, A. R. Jensenius, N. Peters and P. Baltazar (2008): Proceedings of the 2008 International Conference on New Interfaces for Musical Expression, 5-7 June 2008, Genova.

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Abstract:
An approach for creating structured Open Sound Control (OSC) messages by separating the addressing of node values and node properties is suggested. This includes a method for querying values and properties. As a result, it is possible to address complex nodes as classes inside of more complex tree structures using an OSC namespace. This is particularly useful for creating flexible communication in modular systems. A prototype implementation is presented and discussed.